"Until, when he reached the setting of the sun, he found it set in a spring of murky water: Near it he found a People: We said: “O Zul-qarnain! (thou hast authority,) either to punish them, or to treat them with kindness." - Quran 18:86 (read more)

"Narrated Anas bin Malik: While we were sitting with the Prophet in the mosque, a man came riding on a camel. He made his camel kneel down in the mosque, tied its foreleg and then said: "Who amongst you is Muhammad?" At that time the Prophet was sitting amongst us (his companions) leaning on his arm. We replied, "This white man reclining on his arm." They then addressed him" - Sahih Bukhari 1:3:63 (read more)

"It is not permissible to give zakaah on one’s wealth or crops, or Zakaat al-Fitr, to kaafirs, even if they are poor, or wayfarers, or debtors, and if one who gives zakaah to them, that is not counted as zakaah ... It is permissible to give zakaah funds to those kaafirs who hold positions of authority and influence among their people, if there is the hope that by giving them something they may become Muslims, then those who are under them may become Muslim too." - Sheikh Muhammed Salih Al-Munajjid